a位取代对Mn3O4尖晶石介电和阻抗行为的影响

IF 1.3 4区物理与天体物理 Q4 PHYSICS, CONDENSED MATTER

Ferroelectrics Letters Section Pub Date : 2019-06-28 DOI:10.1080/07315171.2019.1647719

Nayana Acharya, Raghavendra Sagar

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引用次数: 4

摘要

本文报道了a位取代对Mn3O4基改性尖晶石在室温下介电行为和电学行为的影响。在40 Hz ~ 8 MHz的频率范围内，a位被Mn、Zn和Co取代的三种尖晶石的相对介电常数ε′和耗散系数tanδ均略有降低。然而，a位取代对纯Mn3O4尖晶石的相对介电常数和耗散因子的影响是显著的。在a位取代Zn后，相对介电常数从~ 16增加到95，而在a位取代Co后，相对介电常数增加到40。a位取代后的tan δ测定也有类似的趋势。频率相关阻抗测量表明，纯尖晶石和改性尖晶石具有较低的阻抗范围和较好的频率相关导电性。

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Influence of A-site substitution on dielectric and impedance behavior of Mn3O4 spinels

Abstract In this paper, we report the influence of A-site substitution on dielectric and electrical behavior of Mn3O4 based modified spinels at room temperature. All the three spinels substituted with Mn, Zn and Co at A-site showed slight decrease in relative permittivity (ε′) and dissipation factor (tanδ) in the studied frequency range of 40 Hz to 8 MHz. However, the influence of A-site substitution was noticeable because of it dominant influence on relative permittivity and dissipation factor over pure Mn3O4 spinel. The relative permittivity increased from ∼ 16 to 95 after substitution of Zn in A-site whereas the substitution of Co increased the magnitude upto 40. Similar trend was observed with tan δ measurement after A-site substitution. The frequency dependent impedance measurement revealed the better conducting behavior of pure and modified spinels because of its low impedance range and better frequency dependent ac-conductivity.

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来源期刊

Ferroelectrics Letters Section 物理-物理：凝聚态物理

CiteScore

1.10

自引率

0.00%

发文量

审稿时长

4.8 months

期刊介绍： Ferroelectrics Letters is a separately published section of the international journal Ferroelectrics. Both sections publish theoretical, experimental and applied papers on ferroelectrics and related materials, including ferroelastics, ferroelectric ferromagnetics, electrooptics, piezoelectrics, pyroelectrics, nonlinear dielectrics, polymers and liquid crystals. Ferroelectrics Letters permits the rapid publication of important, quality, short original papers on the theory, synthesis, properties and applications of ferroelectrics and related materials.